i moved my router from my second floor in the front of my house to my basement in the back. i have a linksys WRT300N so it shud broadcast a strong signal. my computer has the wireless linksys WMP300N adapter and its on my first floor about 40-50 feet away and im recieving a "good" to "very good" signal but rediculously slow...anywhere from 300Kilobits - 2Kilobytes per second

any suggestions on what to do and what could be causing this anoying problem ?